Angle-grinder dust collection

After I used an angle grinder to cut plaster and tile indoors, no cleanup was required. The drawing shows why. If you take a 1-gal. milk jug, cut off the bottom, and attach the neck of the jug to a shop-vacuum hose with duct tape -- and a helper holds it just so -- there is no dust in the air because the vacuum gets it all. I have found that the harder-plastic laundry-detergent jugs work well, too.